Environmental Geography

Map showing areas of increased artificial lighting in the Arctic, with increases in yellow, decreases in purple, and no change in green, using data from the U.S. DMSP satellites. Map: NASA, public domain.

Increased Light Pollution in the Arctic

Caitlin Dempsey

Satellite data shows rising Arctic nighttime lights, driven by growing industrial activity in oil, gas, and infrastructure.

A black and white dragonfly resting on a blade of grass.

Tracking Mercury With Dragonflies

Caitlin Dempsey

Published research mapped mercury levels in dragonfly larvae from 73 U.S. parks, revealing how the metal accumulates in the environment.

View of the Manu'a Islands with the volcanic islands of Ofu and Olosega (background), and Ta'u (foreground). Image, NPS, public domain

A Guide to the Geography of U.S. National Parks

Caitlin Dempsey

Find out the answers to geography trivia questions and more in this article about the geography of U.S. National Parks.

A view of tall eucalyptus trees in a forest.

The Role of Secondary Forests in Reducing Atmospheric Carbon

Mark Altaweel

Secondary forests play an important role in carbon capture strategies aimed towards reducing atmospheric carbon.

Southern California neighborhood scarred by wildfire. Photo: Jon Keeley, USGS Western Ecological Research Center. Public domain.

Study: More U.S. Homes Burn in Grassland and Shrubland Fires than Forest Wildfires

Caitlin Dempsey

A new study in Science reports that in the United States, grassland and shrubland fires tend to be more extensive and burn more houses than forest fires.

Two maps of the Los Angeles area showing changes in nitrogen dioxide over time.

Mapping Air Pollution in the United States

Mark Altaweel

NEMO and TEMPO are two scientific endeavors aimed at producing hourly air pollution maps of the United States.

A flooded street with buildings in the background.

Rising Sea Levels and Human Migration

Mark Altaweel

Researchers predict that by 2100 between 17 to 72 million people will migrate as a result of coastal land loss due to sea level rise.

A satellite view of a wind farm called Windpark Fryslân in the Netherlands.

World’s Largest Freshwater Wind Farm

Caitlin Dempsey

The world's largest freshwater wind farm is the 89-turbine installation in Lake Ijssel located south of the Wadden Sea in the Netherlands.

A tree burning in the North wildfire in Sequoia and Kings Canyon National Parks in 2004.

Causes of Wildfires in the United States

Caitlin Dempsey

Every year, thousands of wildfires rage across the United States, consuming millions of acres.

Annotated satellite image showing a coastal low and wildfire smoke over the northeastern part of the United States.

Wildfire Smoke From Canada is Affecting Parts of the United States

Caitlin Dempsey

Smoke from the June 2023 Canadian wildfires is affecting the Midwest and northern regions of the United States.

Satellite image of Northern Europe at night.

Earth at Night

Caitlin Dempsey

Nighttime lighting is when the effect of humans on the environment is especially pronounced.

Satellite image showing ship track clouds over the Atlantic Ocean off the coast of Portugal.

How Ships Create Clouds Over the Oceans

Caitlin Dempsey

Ships can create a trail of clouds as they travel over the world's oceans.

Satellite image of wildfires burning in New Mexico in May 2022. Smoke can be see flowing from the site of three wildfires near Santa Fe.

Early Wildfires in New Mexico

Caitlin Dempsey

Wildfires in New Mexico are are starting earlier each year due to warmer and drier conditions.

Low lying clouds over a forest.

Study: Afforestation Can Lead to More Cloud Cover

Caitlin Dempsey

Increased forest cover can lead to more low lying clouds which helps to cool the Earth.

A geyser eruption with visitors standing on the boardwalk watching.

Geography Facts About Yellowstone National Park

Caitlin Dempsey

Learn some quick and fun geography facts about Yellowstone National Park.

Photo of the Caldor Fire on the evening of September 9, 2021

Pyrocene: the Age of Fire?

Katarina Samurović

Climate change and human activities are creating record wildfire seasons.

Cover of Michael Hannah's book "Extinctions:  Living and Dying in the Margin of Error".

Review | Extinctions: Living and Dying in the Margin of Error

G.T. Dempsey

This book sets out, in some nine chapters, both the ‘turbulent’ journey of that one species living 3.7 billion years ago to the 8.7 million today and the human activity threatening that biodiversity.

Satellite image showing the McKay Creek fire (left) and the Sparks Lake fire (right) on June 20, 2021 in British Columbia, Canada.

2021 Wildfires in the U.S. and Canada

Caitlin Dempsey

Climate change is causing wildfires to burn longer and more frequently in some northern latitudes.

Various types and sizes of plastics collected from the Kinnickinnic River, Milwaukee, WI. Photo: S. Mason, State University of New York at Fredonia. Public domain. Source: USGS.

Tracking Plastic in the Air

Elizabeth Borneman

Approximately 1,100 tons of microplastics are thought to be floating in the air above the Western United States

Plastic trash bag on the ocean floor.

80% of Plastic in the Ocean Comes From 1,656 Rivers

Caitlin Dempsey

A team of researchers analyzed where geographically rivers are the biggest sources of plastic pollution entering the ocean.

Debris Flow in Cable Canyon following the 2003 Old Fire in the San Bernardino Mountains, California. Photo: USGS, public domain.

Climate Change is Increasing Post-Wildfire Landslides in Southern California

Caitlin Dempsey

A recently published study has forecasted that climate change is driving increased wildfire and landslide risk in Southern California.

Plentiful rains leads to superblooms where the desert becomes blanketed with wildflowers. Photo: Death Valley, NPS, spring 2005.

Geography Facts About Death Valley

Caitlin Dempsey

Learn some interesting geography facts in this article about Death Valley.

The growth of the crack on the Brunt Ice Shelf. Change detection satellite images courtesy of EOS Data Analytics

A View of 2020 from Space

Geo Contributor

EOS Data Analytics, an AI-powered satellite analytics platform, shares satellite imagery that highlights some of the environmental tragedies that occurred in 2020 — California and Colorado fires, Hurricane Laura, Kamchatka spill, Norilsk oil spill, and the Calving on the Brunt Ice Shelf.

Natural color images from the NOAA-NASA Suomi NPP satellite of fires burning in Colorado. Image: NASA, August 15, 2020, public domain.

Three of Colorado’s Wildfires are the Largest in Recorded History for the State

Caitlin Dempsey

Widespread drought and heat waves are helping to fuel a record-breaking fire season in Colorado.

A globe showing carbon monoxide emissions with dark red for higher emissions and green for lower emissions.

Carbon Monoxide from the California Wildfires

Caitlin Dempsey

As wildfires burn in California, carbon monoxide is rising high up into the atmosphere where a NASA satellite is capturing readings.

Satellite imagery showing smoke from the California wildfires on September 2, 2020. Image: the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, public domain.

Smoke from the California Fires Over the Pacific Ocean

Caitlin Dempsey

NASA’s Terra satellite captured this image of smoke from the August Complex fire and other fires burning in California as it blows out over the Pacific Ocean.

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